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Image processing apparatus, display apparatus, display system and control method thereof

Image processing apparatus, display apparatus, display system and control method thereof description/claims

This application claims priority from Korean Patent Application No. 10-2007-0096137, filed on Sep. 20, 2007, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

1. Field of the Invention

Apparatuses and methods consistent with the present invention relate to an image processing apparatus, a display apparatus, a display system and a control method thereof, and more particularly, to an image processing apparatus which transmits an image signal to a display apparatus wirelessly, and a display apparatus, a display system and a control method thereof.

2. Description of the Related Art

An image processing apparatus such as a set-top box transmits an image signal to an external display apparatus such as a TV. With the development of technology and to meet user's demands, the image processing apparatus transmits an image signal wirelessly to the mobile display apparatus. In this case, the image signal is compressed or non-compressed depending on a frequency bandwidth to be transmitted from the image processing apparatus to the display apparatus.

If a distance between the image processing apparatus and the display apparatus increases, the image signal is transmitted at a slower rate. That is, if the distance increases, the display apparatus may not receive the image signal from the image processing apparatus in a normal manner. Recently, as a number of large-sized display apparatuses are provided, the image signal transmitted by the image processing apparatus has a fixed compression rate in consideration of resolution of the display apparatus. If the compression rate of the image signal is fixed, the image may not be displayed normally as the distance between the image processing apparatus and the display apparatus increases.

Accordingly, it is an aspect of the present invention to provide an image processing apparatus which outputs an image signal having a compression rate adjusted corresponding to a distance from a display apparatus.

Also, it is another aspect of the present invention to provide a display apparatus which supplies information on a distance from an image processing apparatus, to the image processing apparatus.

Further, it is another aspect of the present invention to provide a display system which displays a normal image signal regardless of a distance between an image processing apparatus and a display apparatus.

Further, it is another aspect of the present invention to provide a display system which displays a normal image signal regardless of an external environment for a wireless communication.

Additional aspects of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present invention.

The foregoing and/or other aspects of the present invention are also achieved by providing an image processing apparatus, comprising: a signal receiver which receives an image signal; a signal processor which compresses the image signal; a wireless transmitter which transmits the compressed image signal to a display apparatus wirelessly; and a controller which controls the signal processor to raise a compression rate of the image signal according to an increased distance between the wireless transmitter and the display apparatus.

A transmission rate of the image signal may decrease as the compression rate increases.

The controller may determine a minimum compression rate of the image signal corresponding to the distance, and control the compression rate to be the minimum compression rate and above.

The controller may determine the minimum compression rate by comparing the transmission rate of the image signal with a reception rate of the image signal received to the display apparatus.

The image processing apparatus may further comprise a storage unit which stores therein a lookup table on the compression rate corresponding to the distance.

The image processing apparatus may further comprise a distance determiner which determines the distance.

The wireless transmitter may transmit the compressed image signal through IEEE 802.11n.

The foregoing and/or other aspects of the present invention are also achieved by providing an image processing apparatus, comprising: a signal receiver which receives an image signal; a signal processor which compresses the image signal; a wireless transmitter which transmits the compressed image signal to a display apparatus wirelessly; and a controller which determines a maximum transmission rate of an image signal by comparing a transmission rate of the image signal transmitted to the display apparatus with a reception rate of the image signal received to the display apparatus, and adjusts a compression rate of the image signal based on the maximum transmission rate.

The compression rate may decrease as the maximum transmission rate increases.

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